John 1:7

This man came for testimony so that he might testify about the light, so that all might believe through him.

John 1:19

And this is the testimony of John when the Jews sent forth priests and Levites from Jerusalem so that they might ask him, Who are thou?

Acts 19:4

And Paul said, John indeed immersed an immersion of repentance, saying to the people that they should believe in him who was coming after him, that is, in Jesus, the Christ.

John 1:9

He was the TRUE light coming into the world that enlightens every man.

John 1:12

But as many as did accept him, to them he gave power to become children of God, to those who believe in his name,

John 1:15

John testified about him, and cried out, saying, This was he of whom I said, He who comes after me came to be before me, because he was before me.

John 1:26-27

John answered them, saying, I immerse in water, but amidst you stands him whom ye know not.

John 1:32-34

And John testified, saying, I have seen the Spirit descending like a dove out of heaven, and it remained upon him.

John 1:36

And having looked upon Jesus walking, he says, Behold, the Lamb of God!

John 3:26-36

And they came to John, and said to him, Rabbi, he who was with thee beyond the Jordan, about whom thou have testified, behold, this man immerses, and all men come to him.

John 5:33-35

Ye have sent to John, and he has testified to the truth.

Ephesians 3:9

and to make all men see what is the administration of the mystery hidden from the ages in God who created all things through Jesus Christ.

1 Timothy 2:4

who wants all men to be saved and to come to knowledge of truth.

Titus 2:11

For the saving grace of God has appeared to all men,

2 Peter 3:9

The Lord is not slack about his promise, as some regard slackness, but is patient toward us, not wanting any to perish, but all to go forward to repentance.

Treasury of Scripture Knowledge

Summary

The same came for a witness, to bear witness of the Light, that all men through him might believe.

General references

Bible References

A witness

John 1:19
And this is the testimony of John when the Jews sent forth priests and Levites from Jerusalem so that they might ask him, Who are thou?
John 3:26
And they came to John, and said to him, Rabbi, he who was with thee beyond the Jordan, about whom thou have testified, behold, this man immerses, and all men come to him.
John 5:33
Ye have sent to John, and he has testified to the truth.
Acts 19:4
And Paul said, John indeed immersed an immersion of repentance, saying to the people that they should believe in him who was coming after him, that is, in Jesus, the Christ.

That

John 1:9
He was the TRUE light coming into the world that enlightens every man.
John 3:26
And they came to John, and said to him, Rabbi, he who was with thee beyond the Jordan, about whom thou have testified, behold, this man immerses, and all men come to him.
Ephesians 3:9
and to make all men see what is the administration of the mystery hidden from the ages in God who created all things through Jesus Christ.
1 Timothy 2:4
who wants all men to be saved and to come to knowledge of truth.
Titus 2:11
For the saving grace of God has appeared to all men,
2 Peter 3:9
The Lord is not slack about his promise, as some regard slackness, but is patient toward us, not wanting any to perish, but all to go forward to repentance.

General references

Mark 11:30
The immersion of John, was it from heaven, or from men? Answer me.
Acts 13:24
John having earlier proclaimed, before his coming presence, the immersion of repentance to Israel.